ConcurrentModificationException when a JAXRS API has multiple consume and/or produce MediaTypes

[jhanders34]

When a JAXRS API has multiple consume or produce MediaTypes, the list of MediaTypes is sorted for comparison purposes. The same collection of MediaTypes is being sorted by multiple threads instead of just once.

Below is a stack trace for the reported issue.

java.util.ConcurrentModificationException
at java.util.ArrayList.sort(ArrayList.java:1475)
at java.util.Collections.sort(Collections.java:186)
at org.apache.cxf.jaxrs.utils.JAXRSUtils.sortMediaTypes(JAXRSUtils.java:1744)
at org.apache.cxf.jaxrs.provider.ProviderFactory$MessageBodyReaderComparator.compare(ProviderFactory.java:1181)
at org.apache.cxf.jaxrs.provider.ProviderFactory$MessageBodyReaderComparator.compare(ProviderFactory.java:1166)
at java.util.TimSort.countRunAndMakeAscending(TimSort.java:366)
at java.util.TimSort.sort(TimSort.java:231)
at java.util.Arrays.sort(Arrays.java:1856)
at java.util.ArrayList.sort(ArrayList.java:1473)
at java.util.Collections.sort(Collections.java:186)
at org.apache.cxf.jaxrs.provider.ProviderFactory$AtomicReferenceProviderList.addAndSortProviders(ProviderFactory.java:965)
at org.apache.cxf.jaxrs.provider.ProviderFactory.addAndSortReaders(ProviderFactory.java:907)
at org.apache.cxf.jaxrs.provider.ProviderFactory.setCommonProviders(ProviderFactory.java:828)
at org.apache.cxf.jaxrs.client.ClientProviderFactory.setProviders(ClientProviderFactory.java:77)
at org.apache.cxf.jaxrs.provider.ProviderFactory.setUserProviders(ProviderFactory.java:1162)
at org.apache.cxf.jaxrs.client.spec.ClientImpl$WebTargetImpl.request(ClientImpl.java:336)
at org.apache.cxf.jaxrs.client.spec.ClientImpl$WebTargetImpl.request(ClientImpl.java:421)

[annaguri]

@jhanders34 can we have an iFix for 18.0.0.2?

[jim-krueger]

18.0.0.2 i-fix PR: https://github.ibm.com/was-liberty/open-liberty-service/pull/122

[jim-krueger]

18.0.0.2 i-fix links:
https://libfsfe01.hursley.ibm.com//liberty/ifix/18002/cl180220180808-1924-_3lwBoJsvEeig4deLkOQTuA/18002-wlp-archive-IFOLGH4368.jar
https://libfsfe01.hursley.ibm.com//liberty/ifix/18002/cl180220180808-1924-_3lwBoJsvEeig4deLkOQTuA/18.0.0.2-WS-WLP-IFOLGH4368.zip

[jim-krueger]

18.0.0.2 i-fix build: https://wasrtc.hursley.ibm.com:9443/jazz/web/projects/WS-CD#action=com.ibm.team.build.viewResult&id=_3lwBoJsvEeig4deLkOQTuA&tab=com.ibm.team.build.web.ui.internal.editors.result.overview.OverviewPage